Abstract
The great earthquake of M9 was generated in the North Sumatra offing at 7: 58 on December 26th, 2004, and the serious tsunami calamity was produced in every coast of Indian Ocean. We report on the damage survey that we carried out from January 9th to 12th in Thai western coast where typical tsunami damage was produced.
(1) The tsunami height of Khoa Lak coast was about 9m on the sea level, and almost all walls and pillars of buildings within 30m of coastal line were toppled. The flood region had reached to lkm or more inland.
(2) The tsunami height of Patong beach was about 6m on the sea level, and almost all walls and pillars of buildings within 30m of coastal line were not toppled but the flood depth was about 2m.
(3) The tsunami height of Phi Phi island is 6-7m on the sea level at the north side and 3.5-5m on the sea level at the south side.
